E.g.f.: exp(1 / (1 - sin(x)) - 1).

Terms

a(0) =1a(1) =1a(2) =3a(3) =12a(4) =61a(5) =372a(6) =2639a(7) =21280a(8) =191833a(9) =1908688a(10) =20750331a(11) =244478784a(12) =3100597333a(13) =42088689216a(14) =608543191559